Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

nickel hologram/ metal frame & hardware/ cardboard mat/ hardboard backing/ synthetic tape & parts

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

36,3 cm

Largeur

29,3 cm

Hauteur

S/O

Épaisseur

2,4 cm

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Physique

Catégorie

Lumière et radiation électromagnétique

Sous-catégorie

S/O

Fabricant

Ou

See 3

Pays

England

État/province

Inconnu

Ville

London

Contexte

Pays

Canada

État/province

Ontario

Période

late 1980s

Canada

Inconnu

Fonction

A medium which presents a three dimensional image, in this case of a pair of sunglasses. This was master copy of hologram, used for mass replication for advertising purposes.

Technique

An example of a master for an embossed hologram, in the form of a nickel plate, from which multiple copies were made. The theory of holography was developed in 1947 by British/Hungarian scientist Dr. Dennis Gabor while working to improve the resolution of electron microscopes. In 1960 the laser was invented and its pure white light was ideal for holography. In 1962 Emmett Leith and Juris Upatnieks of the University of Michigan, combined Gabor's theory with their own work in side-reading radar and applied it to holography, resulting in the off-axis technique of hologram production still in use & the first laser transmission hologram. Also in 1962 Dr. Yuri N. Denisyuk of the U.S.S.R combined holography with Gabriel Lippmann's work in natural colour photography to produce a white-light reflection hologram which, for the first time, could be viewed in light from an ordinary incandescent light bulb. By 1965 Leith, Upatnieks & other U.S. researchers had developed off-axis reflection holograms. In 1968 Dr. Stephen A. Benton invented white-light transmission holography; this type of hologram can be viewed in ordinary white light creating a "rainbow" image from the seven colours which make up white light. This invention made possible mass production of holograms using an embossing technique, now the most frequently used method mass-production in holography. Embossed holograms are transmission holograms with a mirror backing that are usually applied to magazines, credit cards and promotional materials. Holographic information is transferred from light sensitive glass plates to nickel embossing shims. The holographic images are printed by stamping the interference pattern onto plastic and then backing the images with a light reflecting foil. The resulting hologram can be duplicated millions of times for a few cents apiece (Ref. 1).

Notes sur la région

Inconnu

Détails

Marques

label on front reads "SEE 3 HOLOGRAMS LTD./ 4 MACAULAY ROAD,/ LONDON SW4 OQX." / lettering reading "MARATHON", "ROBERT LA ROCHE" & "HOLOTRON MILANO 1986"

Manque

appears complete

Fini

chrome plated frame/ grey mat/ brown hardboard

Décoration

pair of folded sunglasses visible on hologram